HOUSEHOLD SAFETY: The Pyle Indoor Air Quality Test Kit ensures household safety w/ carbon dioxide gas monitoring. Also measures temperature and humidity w/ standard digital clock/calendar function. Used for home, office, school, business applications TARGET METER: The portable digital home air quality monitor tester features hassle-free operation w/ sleek design. Equipped w/ target meter setting audible and visual alarm notifications. Uses non-dispersive infrared detector for gas measurement BUILT-IN MEMORY: Allows you to save up to 12,700 data readings w/ its built-in memory. Offers accurate and reliable data readout and is laboratory tested for safe pollution detection. Features record function which saves real-time meter readings